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2009 (Vol. 1, Issue: 2)
Article Information:

Some Physical and Chemical Characteristics in Okpoka Creek, Niger Delta, Nigeria

J.F.N. Abowei and A.D.I. George
Corresponding Author:  Abowei Jasper 

Key words:  Physical and chemical characteristics,, Okpoba creek, Niger Delta, Nigeria, , ,
Vol. 1 , (2): Page No: 45-53
Submitted Accepted Published
2009 August, 07 2009 August, 28
Abstract:

Some physical and chemical characteristics in okpoka creek was studied for one year. There was a long wet season stretching from April to October in and a dry season extending from November to March. The total monthly rainfall ranged from 1.8mm to 399.6mm. The highest total rainfall (399.6mm) was recorded in July while the lowest rainfall (1.8mm) was observed in January. The atmospheric temperature fluctuated from 28.5C in July to 33C in M arch. The monthly water temperature values ranged between 27C and 31C across the Stations. The mean temperatures were similar along the Stations (P0.05) ranging from 28.980.23C (Station 4) to 29.770.15C (Station 5). A steady trend of temperature was observed in Stations 1, 2 and 4 as well as in stations 3 and 6. Generally, temperature values were stable across stations. Maximum temperature of 31C was recorded in January, February, March, July, and October. W hile the lowest temperature of 27C was observed in July, August and September. There was slight seasonal variation of temperature between dry (29.490.11C) and wet season (29.090.125C). A steady trend of temperature variation was observed. The mean pH value ranged between 6.680.07 (Station 1) and 7.030.05 (Station 6). The Spatial and temporal variations of pH were minimal. Seasonal variation in pH was observed between dry season (6.970.044) and wet season (6.810.367). Salinity values ranged between 0.60 and 20.90. The highest salinity value (20.90) was recorded in June at station 6 and the lowest salinity value (0.60) was observed in October at station 1. The means varied from 4.750.79 (Station 1) to 12.651.36 (Station 6). There was spatial variation with a general trend that showed increased salinity values from station 1 to station 6. Some Seasonal variation was also observed with higher salinity during the dry season (11.670.517) than the wet season (6.980.701). Dissolved oxygen values values range from 0.4mg/L and 8.34 mg/L. The highest dissolved oxygen concentration (9.6mg/L) was observed in station 3 while the lowest value (0.4mg/L) was recorded in station 6. The mean dissolved oxygen concentrations ranged between 3.72041mg/L and 5.100.29mg/L across the stations. There was no seasonal and annual variation observed in the concentrations of dissolved oxygen. Biochemical oxygen demand varied from 0.0mg/L to 6.4mg/L. The lowest biochemical oxygen demand value (0.0mg/L) was recorded in December and the highest value (6.4mg/L) was observed in station 1 (March) as well as station 4. The mean biochemical oxygen demand oxygen ranged between 1.970.28mg/L and 2.690.26mg/L across the stations. No seasonal and temporal variations were observed in the biochemical oxygen demand. Monthly conductivity values observed ranged from 920mscm-1 and 33100mscm-1 across the stations. Generally, an increasing trend was observed from station 1 to station 6 with mean values varying from 10788.751053.87mscm-1 (Station 1) to 24877.921430.65mscm-1 (Station 6). Seasonal variation in conductivity with a general trend of higher conductivity in the dry season 18943.17914.304mscm-1 than the wet 16794.38985.154mscm-1 season was observed. Spatial variation of conductivity was significant (p<0.05) with a general trend of increase from station 1 (upstream) to station 6 (downstream).
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  Cite this Reference:
J.F.N. Abowei and A.D.I. George, 2009. Some Physical and Chemical Characteristics in Okpoka Creek, Niger Delta, Nigeria.  Research Journal of Environmental and Earth Sciences, 1(2): Page No: 45-53.
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ISSN (Online):  2041-0492
ISSN (Print):   2041-0484
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